A German-based humanitarian worker has been sentenced to 10 years in prison in Iran after entering the country to help vulnerable Iranians, Stuttgart-based aid organization STELP said.
Serkan Eren, the 42-year-old founder of STELP, was convicted over alleged contacts with a country Iran considers hostile, according to the organization. STELP has not identified the country or disclosed further details, citing concerns for Eren and others involved.
Eren, a Turkish citizen and longtime resident of Germany, has been in Iranian custody for more than a year.
He entered Iran in late June 2025 as the 12-day war was drawing to a close. Five days later, after a ceasefire had taken effect, he headed toward the Iraqi border to leave the country. He never made it out.
STELP called the verdict unjustified and said the sentence did not reflect the circumstances of his case.
“The ten-year prison sentence given to Serkan Eren is not about what he has done. It is about what the Islamic Republic wants,” Shahin Milani, executive director of the Iran Human Rights Documentation Center, told Iran International.
Milani said Eren's charitable work offered little protection from what he described as Tehran's established practice of using foreign detainees as political leverage.
“Even working for a charitable organization does not protect foreign nationals,” he said.
Contemporaneous German reporting provides a detailed account of why Eren went to Iran and the precautions he took before entering.
German-Iranians had approached STELP seeking help for relatives inside the country, according to the Stuttgarter Zeitung. Eren said he was in contact with seven elderly Iranians, some of them ill, whom he hoped to help reach Turkey. He also intended to bring food into Tehran.
The risks were apparent before he crossed the border.
Eren deliberately left behind a satellite phone, bulletproof vest and helmet, fearing such equipment could cause Iranian authorities to mistake him for an agent or saboteur. Instead, he crossed from Turkey into Iran on foot with little more than a backpack.
Once inside, those concerns intensified. Eren later described armed checkpoints on his route to Tehran where he was forced to strip naked during searches.
More than a year later, an Islamic Republic court convicted him over alleged contacts with a hostile country.
Human rights lawyer Gissou Nia said humanitarian status has not historically insulated either foreign aid workers or Iranian charities from pressure by the authorities.
“Unfortunately, being a humanitarian aid worker is not a shield when it comes to the Islamic Republic detaining and arbitrarily imprisoning individuals,” Nia told Iran International.
She cited the case of Belgian humanitarian worker Olivier Vandecasteele, who was detained in Iran in 2022 and later sentenced to a lengthy prison term before being released in 2023 in a prisoner exchange involving Assadollah Assadi, an Iranian diplomat imprisoned in Belgium over a foiled bomb plot.
“This is a pattern that we've seen before,” Nia said.
Nia also pointed to the treatment of humanitarian organizations operating inside Iran. The Imam Ali Popular Students Relief Society, a prominent independent charity that worked with impoverished families and vulnerable children, was dissolved following years of pressure from Iranian authorities.
The Center for Human Rights in Iran reported in 2022 that an appeals court upheld an order dissolving the organization after authorities arrested several of its members and accused its founder of offenses including insulting Iran's leadership and acting against national security.
The case, Nia said, illustrates how work designed to remain outside politics can itself become politically charged in Iran.
“Even the sort of non-politicized work of humanitarian aid organizations has been politicized in some ways,” she said.
Eren's Turkish citizenship adds another layer to efforts to secure his release.
Despite living in Germany and running a Stuttgart-based organization, Eren does not hold German citizenship. Germany's Foreign Office has said it is aware of his case but that responsibility rests with Turkish authorities because he is a Turkish national. STELP says it has been working closely with Ankara since his detention.
Nia said his ties to Germany nevertheless give Berlin reason to remain engaged.
“I anticipate that Germany will raise the case, especially because he was working for a German-based organization,” she said. “And the Turkish government will probably be involved as well, because he is a Turkish citizen.”
The sentence has already drawn calls for Eren's release in Germany. Baden-Württemberg Minister-President Cem Özdemir said he would continue pushing for Eren to be freed immediately.
Eren has spent years working in humanitarian crises. He began aid work during Europe's 2015 refugee crisis and received Germany's Federal Order of Merit in 2023 for his humanitarian service.
Before entering Iran, he openly questioned whether authorities would allow him into the country at all.
“It’s arbitrary,” Eren told the Stuttgarter Zeitung at the time.
He nevertheless hoped his status as a humanitarian worker would help protect him.
It did not.